论文标题
灰尘尺寸分布的影响，包括大灰尘晶粒对磁性电阻率：一种分析方法
Impact of dust size distribution including large dust grains on magnetic resistivity: an analytical approach
论文作者
论文摘要
本文研究了灰尘尺寸分布对磁性电阻率的影响。特别是，当最大灰尘尺寸显着增加了亚微米时，我们将重点关注其影响。本文的前半部分介绍了我们的计算方法，该方法基于\ citet {1987apj ... 320..803d}的模型，表明该方法重现了更逼真的化学反应网络计算的结果。然后，我们描述了具有大型最大灰尘晶粒的灰尘分布的电阻率计算结果。我们的结果表明，电阻率往往会随着灰尘的生长而降低，当灰尘尺寸功率指数$ q $为$ q = 2.5 $时，这尤其如此。另一方面，当灰尘尺寸的功率指数$ q $为$ q = 3.5 $，即当小灰尘还负责灰尘横截面时，降低不太明显。我们的结果表明，详细的尘埃凝血和碎裂过程在原恒星形成中的磁性电阻率中起着至关重要的作用。
This paper investigates the impact of dust size distribution on magnetic resistivity. In particular, we focus on its impact when the maximum dust size significantly increases from sub-micron. The first half of the paper describes our calculation method for magnetic resistivity based on the model of \citet{1987ApJ...320..803D} and shows that the method reproduces the results of a more realistic chemical reaction network calculations reasonably well. Then, we describe the results of the resistivity calculations for dust distributions with large maximum dust grains. Our results show that resistivity tends to decrease with dust growth, which is particularly true when the dust size power exponent $q$ is $q=2.5$. On the other hand, the decrease is less pronounced when the dust size power exponent $q$ is $q=3.5$, i.e., when the small dust is also responsible for the dust cross-section. Our results suggest that detailed dust coagulation and fragmentation processes play a vital role in the magnetic resistivities in protostar formation.
